欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

java--spring boot微信支付服务端实现含代码(app支付、扫码支付等)

程序员文章站 2022-07-13 17:14:18
...

最近在弄支付宝、微信支付等的事,发现这两家的文档都写得很差,demo也让人看的云里雾里。所以写篇博客,来尽量减少后来的同学走的弯路。

首先,若是要做app支付的话,在微信第三方平台申请APP,若是安卓的话上传你的keystore和包名,ios上传bundle id,微信会生成相应的签名。

然后前往微信商户平台,拿到要做支付必要的各种id和**。

请看以下配置代码:

package com.kyd.callcenter.util.weixin;

import com.github.wxpay.sdk.WXPayConfig;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

public class WXMyConfigUtil implements WXPayConfig {
    private byte[] certData;

    public WXMyConfigUtil() throws Exception {
        String certPath = "证书地址";//从微信商户平台下载的安全证书存放的目录

        File file = new File(certPath);
        InputStream certStream = new FileInputStream(file);
        this.certData = new byte[(int) file.length()];
        certStream.read(this.certData);
        certStream.close();
    }

    @Override
    public String getAppID() {
        return "填写你的appid";
    }

    //parnerid
    @Override
    public String getMchID() {
        return "填写商户id";
    }

    @Override
    public String getKey() {
        return "填写api**";
    }

    @Override
    public InputStream getCertStream() {
        ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);
        return certBis;
    }

    @Override
    public int getHttpConnectTimeoutMs() {
        return 8000;
    }

    @Override
    public int getHttpReadTimeoutMs() {
        return 10000;
    }
}

要想调用微信sdk的话,请记得在你项目中的pom文件中加入以下:

        <dependency>
            <groupId>com.github.wxpay</groupId>
            <artifactId>wxpay-sdk</artifactId>
            <version>0.0.3</version>
        </dependency>
先说app支付,前端访问服务器端,服务器端返回生成签名后的订单信息。

如何生成订单信息呢?以下是代码:

controller:

 @RequestMapping(value = "/pay", method = {RequestMethod.GET, RequestMethod.POST})
    public String orderPay(/*@RequestParam(required = true,value = "user_id")String user_id,
                           @RequestParam(required = true,value = "coupon_id")String coupon_id,
            @RequestParam(required = true,value = "out_trade_no")String out_trade_no,
                         @RequestParam(required = true,value = "total_fee")String total_fee,*/
                           HttpServletRequest req, HttpServletResponse response) throws Exception {
        System.err.println("进入微信支付申请");
        Date now = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");//可以方便地修改日期格式
        String hehe = dateFormat.format(now);

        String out_trade_no=hehe+"wxpay";  //777777 需要前端给的参数
        String total_fee="1";              //7777777  微信支付钱的单位为分
        String user_id="1";               //77777
        String coupon_id="7";               //777777

        String attach=user_id+","+coupon_id;
        WXMyConfigUtil config = new WXMyConfigUtil();
//        String spbill_create_ip = GetIPAddrUtil.getIpAddr(req);
        String spbill_create_ip="10.4.21.78";
        System.err.println(spbill_create_ip);
        Map<String,String> result = wxPayService.dounifiedOrder(attach,out_trade_no,total_fee,spbill_create_ip,1);
        String nonce_str = (String)result.get("nonce_str");
        String prepay_id = (String)result.get("prepay_id");
        Long time =System.currentTimeMillis()/1000;
        String timestamp=time.toString();

        //签名生成算法
        MD5Util md5Util = new MD5Util();
        Map<String,String> map = new HashMap<>();
        map.put("appid",config.getAppID());
        map.put("partnerid",config.getMchID());
        map.put("package","Sign=WXPay");
        map.put("noncestr",nonce_str);
        map.put("timestamp",timestamp);
        map.put("prepayid",prepay_id);
        String sign = md5Util.getSign(map);

        String resultString="{\"appid\":\""+config.getAppID()+"\",\"partnerid\":\""+config.getMchID()+"\",\"package\":\"Sign=WXPay\"," +
                "\"noncestr\":\""+nonce_str+"\",\"timestamp\":"+timestamp+"," +
                "\"prepayid\":\""+prepay_id+"\",\"sign\":\""+sign+"\"}";
        System.err.println(resultString);

        return resultString;    //给前端app返回此字符串,再调用前端的微信sdk引起微信支付

    }

其中调用了service中的方法,若是扫码支付的话只要把trade_type改成NATIVE即可,具体以微信官方文档为准:

 @Override
    public Map<String, String> dounifiedOrder(String attach, String out_trade_no, String total_fee,String spbill_create_ip,int type) throws Exception {
        Map<String, String> fail = new HashMap<>();
        WXMyConfigUtil config = new WXMyConfigUtil();
        WXPay wxpay = new WXPay(config);
        Map<String, String> data = new HashMap<String, String>();
 //      data.put("appid", config.getAppID());
//        data.put("mch_id", config.getMchID());
//        data.put("nonce_str",WXPayUtil.generateNonceStr());
//        data.put("nonce_str","6128be982a7f40daa930025dedd1a90d");
        String body="订单支付";
        data.put("body", body);
        data.put("out_trade_no", out_trade_no);
        data.put("total_fee", total_fee);
        data.put("spbill_create_ip",spbill_create_ip);
        //异步通知地址(请注意必须是外网)
        data.put("notify_url", "http://1y8723.51mypc.cn:21813/api/wxpay/notify");
 
        data.put("trade_type", "APP");
        data.put("attach", attach);
//        data.put("sign", md5Util.getSign(data));
        StringBuffer url= new StringBuffer();
        try {
            Map<String, String> resp = wxpay.unifiedOrder(data);
            System.out.println(resp);
            String returnCode = resp.get("return_code");    //获取返回码
            String returnMsg = resp.get("return_msg");

            if("SUCCESS".equals(returnCode)){       //若返回码为SUCCESS,则会返回一个result_code,再对该result_code进行判断
                String resultCode = (String)resp.get("result_code");
                String errCodeDes = (String)resp.get("err_code_des");
                System.out.print(errCodeDes);
                if("SUCCESS".equals(resultCode)){
                    //获取预支付交易回话标志
                    Map<String,String> map = new HashMap<>();
                    String prepay_id = resp.get("prepay_id");
                    String signType = "MD5";
                    map.put("prepay_id",prepay_id);
                    map.put("signType",signType);
                    String sign = md5Util.getSign(map);
                    resp.put("realsign",sign);
                    url.append("prepay_id="+prepay_id+"&signType="+signType+ "&sign="+sign);
                    return resp;
                }else {
                    logger.info("订单号:{},错误信息:{}",out_trade_no,errCodeDes);
                    url.append(errCodeDes);
                }
            }else {
                logger.info("订单号:{},错误信息:{}",out_trade_no,returnMsg);
                url.append(returnMsg);
            }

        } catch (Exception e) {
            System.out.println("aaaaaaaaaaaaa");
            System.out.println(e);
            logger.info(e.getMessage());
        }
        return fail;
    }

若是支付成功,微信会给你的服务器发送异步通知。所以如何处理此通知也告诉大家:

controller:

 /**
     * 订单支付异步通知
     */
    @ApiOperation(value = "手机订单支付完成后回调")
    @RequestMapping(value = "/notify",method = {RequestMethod.GET, RequestMethod.POST})
    public String WXPayBack(HttpServletRequest request,HttpServletResponse response){
        String resXml="";
        System.err.println("进入异步通知");
        try{
            //
            InputStream is = request.getInputStream();
            //将InputStream转换成String
            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            StringBuilder sb = new StringBuilder();
            String line = null;
            try {
                   while ((line = reader.readLine()) != null) {
                            sb.append(line + "\n");
                          }
                 } catch (IOException e) {
                      e.printStackTrace();
                   } finally {
               try {
                    is.close();
                    } catch (IOException e) {
                     e.printStackTrace();
                     }
            }
            resXml=sb.toString();
            System.err.println(resXml);
           String result = wxPayService.payBack(resXml);
//            return "<xml><return_code><![CDATA[SUCCESS]]></return_code> <return_msg><![CDATA[OK]]></return_msg></xml>";
            return result;
        }catch (Exception e){
            logger.error("手机支付回调通知失败",e);
            String result = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
            return result;
        }
    }
其中调用的service方法:

 /**
     *  支付结果通知
     * @param notifyData    异步通知后的XML数据
     * @return
     */
    @Override
    public String payBack(String notifyData) {
        WXMyConfigUtil config = null;
        try {
            config = new WXMyConfigUtil();
        } catch (Exception e) {
            e.printStackTrace();
        }
        WXPay wxpay = new WXPay(config);
        String xmlBack="";
        Map<String, String> notifyMap = null;
        try {
            notifyMap = WXPayUtil.xmlToMap(notifyData);         // 转换成map
            if (wxpay.isPayResultNotifySignatureValid(notifyMap)) {
                // 签名正确
                // 进行处理。
                // 注意特殊情况:订单已经退款,但收到了支付结果成功的通知,不应把商户侧订单状态从退款改成支付成功
                String  return_code = notifyMap.get("return_code");//状态
                String out_trade_no = notifyMap.get("out_trade_no");//订单号

                if(return_code.equals("SUCCESS")){
                    if(out_trade_no!=null){
                        //处理订单逻辑
                        /**
                         *          更新数据库中支付状态。
                         *          特殊情况:订单已经退款,但收到了支付结果成功的通知,不应把商户侧订单状态从退款改成支付成功。
                         *          此处需要判断一下。后面写入库操作的时候再写
                         *
                         */
                      
                        System.err.println(">>>>>支付成功");

                        logger.info("微信手机支付回调成功订单号:{}",out_trade_no);
                        xmlBack = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>" + "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> ";
                    }else {
                        logger.info("微信手机支付回调失败订单号:{}",out_trade_no);
                        xmlBack = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
                    }

                }
                return xmlBack;
            }
            else {
                // 签名错误,如果数据里没有sign字段,也认为是签名错误
                logger.error("手机支付回调通知签名错误");
                xmlBack = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
                return xmlBack;
            }
        } catch (Exception e) {
            logger.error("手机支付回调通知失败",e);
            xmlBack = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
        }
        return xmlBack;
    }
要给微信服务器返回处理成功的xml格式的字符串,我在代码中已经写得很清楚了。

我相信以上代码不难看懂,如果有问题的同学评论问我我再做补充。

顺便把用到的工具类一起给大家:

MD5生成签名算法:

package com.kyd.callcenter.util.weixin;

import com.github.wxpay.sdk.WXPayConstants;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Map;
import java.util.Set;

public class MD5Util {

    public String getSign(Map<String, String> data) throws Exception {
        WXMyConfigUtil config = new WXMyConfigUtil();
        Set<String> keySet = data.keySet();
        String[] keyArray = keySet.toArray(new String[keySet.size()]);
        Arrays.sort(keyArray);
        StringBuilder sb = new StringBuilder();
        for (String k : keyArray) {
            if (k.equals(WXPayConstants.FIELD_SIGN)) {
                continue;
            }
            if (data.get(k).trim().length() > 0) // 参数值为空,则不参与签名
                sb.append(k).append("=").append(data.get(k).trim()).append("&");
        }
        sb.append("key=").append(config.getKey());
        MessageDigest md = null;
        try {
            md = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        byte[] array = new byte[0];
        try {
            array = md.digest(sb.toString().getBytes("UTF-8"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        StringBuilder sb2 = new StringBuilder();
        for (byte item : array) {
            sb2.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
        }
        return sb2.toString().toUpperCase();
    }



}